How to block a domain in outlook

Last Updated: Feb 17, 2024 by

Outlook is a popular email client used by millions of people around the world. While it offers many useful features, one common issue that users face is receiving unwanted emails from certain domains. These emails can be spam, phishing attempts, or simply unwanted messages from a particular sender. In this article, we will discuss how to block a domain in Outlook to prevent these unwanted emails from cluttering your inbox.

Why Block a Domain in Outlook?

Before we dive into the steps of blocking a domain in Outlook, let’s first understand why you might want to do so. As mentioned earlier, receiving unwanted emails from a particular domain can be a nuisance. These emails can take up space in your inbox, making it difficult to find important emails. They can also be a security risk, as some of these emails may contain malicious links or attachments. By blocking a domain, you can prevent these emails from reaching your inbox and keep your account safe.

Steps to Block a Domain in Outlook

Now, let’s get into the steps of how to block a domain in Outlook. Please note that these steps may vary slightly depending on the version of Outlook you are using.

Step 1: Open Outlook and Go to Settings

The first step is to open Outlook and go to the settings menu. This can be done by clicking on the gear icon in the top right corner of the screen.

Step 2: Go to “View all Outlook settings”

In the settings menu, scroll down and click on “View all Outlook settings” at the bottom of the page.

Step 3: Go to “Mail” Settings

In the new window that opens, click on the “Mail” tab on the left-hand side.

Step 4: Go to “Junk email” Settings

Scroll down to the “Junk email” section and click on it to expand the options.

Step 5: Add the Domain to the Blocked List

Under the “Blocked senders and domains” section, click on the “Add” button. In the pop-up window, enter the domain you want to block and click on “Save”.

Step 6: Save Changes

Finally, click on the “Save” button at the bottom of the page to save your changes. This will ensure that any emails from the blocked domain will be automatically sent to your junk folder.

Additional Tips

  • If you want to unblock a domain in the future, simply go back to the “Blocked senders and domains” section and click on the “x” next to the domain you want to unblock.
  • You can also block specific email addresses instead of entire domains by following the same steps and entering the email address instead of the domain.
  • It is recommended to regularly check your junk folder for any important emails that may have been mistakenly marked as spam.


By following these simple steps, you can easily block a domain in Outlook and prevent unwanted emails from cluttering your inbox. This will not only save you time and frustration, but also help keep your account safe from potential security threats. Have you ever had to block a domain in Outlook? Let us know in the comments.

Gulrukh Ch

About the Author: Gulrukh Ch

Gulrukh Chaudhary, an accomplished digital marketer and technology writer with a passion for exploring the frontiers of innovation. Armed with a Master's degree in Information Technology, Gulrukh seamlessly blends her technical prowess with her creative flair, resulting in captivating insights into the world of emerging technologies. Discover more about her on her LinkedIn profile.